Addison Rae Celebrates 21st Birthday in Swimsuit 

Happy birthday, Addison Rae! The TikTok star and actress turned 21 on Wednesday, celebrating her big day on the beach and flaunting her curves, of course. “What’s my age again?” she captioned the snap, taken from the beach in Hawaii. How does the young star keep herself so fit? Read on for five ways Addison Rae stays in shape and the photos that prove they work—and to get beach-ready yourself, don't miss these essential 30 Best-Ever Celebrity Bikini Photos!

1. Her Workouts Are Hardcore

Addison takes her workouts very seriously. She is one of the many celebs who pumps iron at The Dogpound, where she goes hard. The gym recently shared a video of one of her sessions, showing her in perfect form as she executes battle ropes, cable glute kickbacks, jumping jack slams and ankle weight kickbacks like a pro.

2. She Works Out with Pals

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Addison likes making exercise a group activity. In addition to hitting the gym with pals, during the pandemic, she trained virtually with pal and co-star Kourtney Kardashian.

3. Her Glutes Are a Big Focus

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Addison focuses a lot of her workout energy on her backside. "I've done this butt workout so many times because it literally burns so bad but it's so good,” she told Kourtney during their workout video. Donkey kicks, fire hydrants and fire hydrant extensions on each leg for two circuits were part of her routine.

4. She Has an Active Lifesyle

Addison stays active even when she isn’t formally working out. Skateboarding, surfing, kayaking, kickboxing, and hiking are just a few of the activities she regularly partakes in.

5. She Dances

Seeing as though she is a TikTok star, Addison burns a lot of calories and keeps her heartrate up by dancing. "During aerobic activity, you repeatedly move large muscles in your arms, legs and hips. You'll notice your body's responses quickly," says the Mayo Clinic. "You'll breathe faster and more deeply. This maximizes the amount of oxygen in your blood. Your heart will beat faster, which increases blood flow to your muscles and back to your lungs. Your small blood vessels (capillaries) will widen to deliver more oxygen to your muscles and carry away waste products, such as carbon dioxide and lactic acid. Your body will even release endorphins, natural painkillers that promote an increased sense of well-being."